package com.Interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
 
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.pojo.OUser;
 

 
public class LoginInterceptor implements HandlerInterceptor{
 
 @Override
 public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
   throws Exception {
  
   
 }
 
 @Override
 public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
   throws Exception {
  
   
 }
 

 
 
@Override
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception {
  // TODO Auto-generated method stub

  HttpSession session=request.getSession();
  OUser user=(OUser)session.getAttribute("user");
  if(user==null){
   
   request.getRequestDispatcher("/login.html").forward(request, response);
   //本次访问被拦截，业务逻辑不继续执行
   return false;
  } 
  //返回true代表继续往下执行
  return true;
 }
}

